In general, there are some parts of castlevania iv that mildly feel like splatterhouse to me terms of design...
I can definitely see that, especially in the castle stages, such as the tables and coffin enemies, the ghost dancers seem like something in Splatterhouse, and stage 8 could've been a Splatterhouse stage of made a little more gruesome. And more cinematic parts like Drac's buildup are very Splatterhouse
The Adventure- Lose power ups after taking damage, similar to Mario games, Belmont's Revenge- Megaman like stage select, Legends- take and store boss power ups after defeating them, for use whenever player sees fit, like Megaman again.
I've been getting into old horror magazines from the 70s lately, and a ton of them evoke so much CV, like a lot of these:
http://www.gwthomas.org/ssrgcomics1972.htmEspecially the Dax and Daggar ones (one of the Daggar ones he's using a chain whip lol, and one of the Dax ones has Drac, Wolfman, Mummy, and warrior hero Dax front and center while a castle sits in the background)